Jos tutkimusta ei voida tehdä (jos aine esim. hajoaa, sillä on korkea pinta-aktiivisuus, se reagoi rajusti kokeessa tai ei liukene veteen eikä oktanoliin, tai jos ei ole mahdollista saada tarpeeksi puhdasta ainetta), on logP:lle toimitettava laskettu arvo ja selostettava laskentamenetelmä tarkkaan.
If the test cannot be performed (e.g. the substance decomposes, has a high surface activity, reacts violently during the performance of the test or does not dissolve in water or in octanol, or it is not possible to obtain a sufficiently pure substance), a calculated value for log P as well as details of the calculation method shall be provided.EurLex-2 EurLex-2